/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.wct;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;

import java.io.PrintWriter;
import java.io.StringWriter;

import org.apache.jmeter.config.Arguments;
import org.apache.jmeter.protocol.java.sampler.AbstractJavaSamplerClient;
import org.apache.jmeter.protocol.java.sampler.JavaSamplerContext;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

/**
 * Sends one message when a connection is open and echoes back any received data to the server. Simply put, the echo
 * client initiates the ping-pong traffic between the echo client and server by sending the first message to the server.
 */
public final class EchoTest extends AbstractJavaSamplerClient
{
    private final Logger logger = LogManager.getLogger(EchoTest.class);

    static final boolean SSL = System.getProperty("ssl") != null;

    static final String HOST = System.getProperty("host", "120.27.109.100");

    static final int PORT = Integer.parseInt(System.getProperty("port", "4123"));

    private void test(Long deviceId)
        throws Exception
    {
        // Configure SSL.git
        final SslContext sslCtx;
        if (SSL)
        {
            sslCtx = SslContext.newClientContext(InsecureTrustManagerFactory.INSTANCE);
        }
        else
        {
            sslCtx = null;
        }

        // Configure the client.
        EventLoopGroup group = new NioEventLoopGroup();
        try
        {
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
            // .option(ChannelOption.TCP_NODELAY, true)
            .handler(new ChannelInitializer<SocketChannel>()
                {
                @Override
                public void initChannel(SocketChannel ch)
                    throws Exception
                {
                    ChannelPipeline p = ch.pipeline();
                    if (sslCtx != null)
                    {
                        p.addLast(sslCtx.newHandler(ch.alloc(), HOST, PORT));
                    }
                    // p.addLast(new LoggingHandler(LogLevel.INFO));
                    p.addLast(new EchoClientHandler(deviceId));
                }
                });

            // Start the client.
            ChannelFuture f = b.connect(HOST, PORT).sync();

            // Wait until the connection is closed.
            f.channel().closeFuture().sync();
        }
        finally
        {
            // Shut down the event loop to terminate all threads.
            group.shutdownGracefully();
        }
    }

    @Override
    public SampleResult runTest(JavaSamplerContext arg0)
    {
        SampleResult sampleResult = new SampleResult();
        sampleResult.sampleStart();
        String deviceID = arg0.getParameter("deviceId");
        try
        {
            logger.debug(deviceID);
            test(Long.parseLong(deviceID));
            sampleResult.sampleEnd();
            sampleResult.setResponseCode("0");
            sampleResult.setSuccessful(true);
        }
        catch (Exception e)
        {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            e.printStackTrace(pw);
            
            logger.error(sw.toString());
            sampleResult.sampleEnd();
            sampleResult.setResponseCode("1");
            sampleResult.setSuccessful(false);
        }

        // 返回
        return sampleResult;
    }

    @Override
    public Arguments getDefaultParameters()
    {
        Arguments params = new Arguments();
        params.addArgument("deviceId", "${deviceId}");// 设置参数，并赋予默认值0
        return params;
    }
}
